Chore: Add issue/pr template and general housekeeping tools and docs (#900)

* Add linting

* Add issue templates and docs

* Add root eslint config and remove tslint

* Autofix lint issues

.github/ISSUE_TEMPLATE/bug_report.yml

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+name: Bug Report
+description: Report an rrweb bug
+title: '[Bug]: '
+labels:
+  - 'bug'
+body:
+  - type: checkboxes
+    attributes:
+      label: Preflight Checklist
+      description: Please ensure you've completed all of the following.
+      options:
+        - label: I have searched the [issue tracker](https://www.github.com/rrweb-io/rrweb/issues) for a bug report that matches the one I want to file, without success.
+          required: true
+  - type: dropdown
+    attributes:
+      label: What package is this bug report for?
+      options:
+        - rrweb
+        - rrweb-snapshot
+        - rrdom
+        - rrweb-player
+        - Other (specify below)
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Expected Behavior
+      description: A clear and concise description of what you expected to happen.
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Actual Behavior
+      description: A clear description of what actually happens.
+    validations:
+      required: true
+  - type: input
+    attributes:
+      label: Testcase Gist URL
+      description: If you can reproduce the issue in a standalone test case, please save your recording events.json to a [GitHub gist](https://gist.github.com), paste that gist link into [rrwebdebug.com](https://rrwebdebug.com) and put the rrwebdebug.com URL here. This is **the best way** to ensure this issue is triaged quickly.
+      placeholder: https://rrwebdebug.com/...
+  - type: textarea
+    attributes:
+      label: Additional Information
+      description: If your problem needs further explanation, or if the issue you're seeing cannot be reproduced in a gist, please add more information here.

.github/ISSUE_TEMPLATE/feature_request.yml

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+name: Feature Request
+description: Suggest an idea for rrweb
+title: '[Feature Request]: '
+labels:
+  - 'feature request'
+body:
+  - type: checkboxes
+    attributes:
+      label: Preflight Checklist
+      description: Please ensure you've completed all of the following.
+      options:
+        - label: I have searched the [issue tracker](https://www.github.com/rrweb-io/rrweb/issues) for a feature request that matches the one I want to file, without success.
+          required: true
+  - type: dropdown
+    attributes:
+      label: What package is this feature request for?
+      options:
+        - rrweb
+        - rrweb-snapshot
+        - rrdom
+        - rrweb-player
+        - Other (specify below)
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Problem Description
+      description: Please add a clear and concise description of the problem you are seeking to solve with this feature request.
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Proposed Solution
+      description: Describe the solution you'd like in a clear and concise manner.
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Alternatives Considered
+      description: A clear and concise description of any alternative solutions or features you've considered.
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Additional Information
+      description: Add any other context about the problem here.
+    validations:
+      required: false

.github/config.yml

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+# Comment to be posted to on PRs from first time contributors in your repository
+newPRWelcomeComment: |
+  💖 Thanks for opening this pull request! 💖
+
+  Things that will help get your PR across the finish line:
+
+  - Follow the TypeScript [coding style](https://github.com/rrweb-io/rrweb/blob/master/docs/development/coding-style.md).
+  - Run `yarn lint` locally to catch formatting errors earlier.
+  - Document any user-facing changes you've made following the [documentation styleguide](https://github.com/rrweb-io/rrweb/blob/master/blob/main/docs/styleguide.md).
+  - Include tests when adding/changing behavior.
+  - Include screenshots and animated GIFs whenever possible.
+
+  We get a lot of pull requests on this repo, so please be patient and we will get back to you as soon as we can.
+
+# Configuration for first-pr-merge - https://github.com/behaviorbot/first-pr-merge
+
+# Comment to be posted to on pull requests merged by a first time user
+firstPRMergeComment: >
+  Congrats on merging your first pull request! 🎉🎉🎉Hallo